Solid-State Kinetic Investigations of Nonisothermal Reduction of Iron Species Supported on SBA-15

Figure 13

Apparent activation energy as function of reduction degree for the reduction of 2.5 wt% Fe_Citrate (circles), 2.0 wt% Fe_Nitrate (triangles), 7.2 wt% Fe_Nitrate (squares), and Fe₂O₃/SBA-15 (pentagons) in 5% H₂ in 95% argon (with Senum-Yang approximation). Apparent activation energies as determined from Kissinger method are indicated at (stars).